Identity of a thread

Assume Net process P runs under windows account A1. I assume if thread ( running within P ) is running under some other identity ( obtained via Thread.CurrentPrincipal.Identity ) than A1, it still has the same rights as A开发者_JS百科1 when accessing system resources ( such as files etc )?

thank you

I would not expect a thread that has a different identity to "inherit" the permissions from the process identity.

Just to be sure I ran an impersonation test .Using the sample here WindowsIdentity.Impersonate I ran the following code on a different thread.

  WindowsIdentity newId = new WindowsIdentity(safeTokenHandle.DangerousGetHandle());
  Thread.CurrentPrincipal = new WindowsPrincipal(newId);
  string foo = System.IO.File.ReadAllText (@"test.txt");
  Console.WriteLine(foo);

Even though the ID of the process has rights to read test.txt it if the newID doesn't it fails.